The SD03C with TVS SOD-323 RoHS is a surface-mount device produced by Yenji. It is a unidirectional transient voltage suppressor (TVS) designed to help protect sensitive electronics from voltage spikes, which can cause catastrophic damage. The device consists of two zener-connected diodes in series, which absorb any excess voltage over a predetermined level. The SD03C has a maximum peak pulse power of 600 watts and a maximum clamping voltage of 12.5 volts. It is RoHS compliant and comes in an SOD-323 package, making it small enough to fit into a variety of small electronics applications.